213392506 has 4 divisors (see below), whose sum is σ = 320088762. Its totient is φ = 106696252.

The previous prime is 213392489. The next prime is 213392507. The reversal of 213392506 is 605293312.

213392506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 211964481 + 1428025 = 14559^2 + 1195^2 .

It is not an unprimeable number, because it can be changed into a prime (213392507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53348125 + ... + 53348128.

Almost surely, 2^213392506 is an apocalyptic number.

213392506 is a deficient number, since it is larger than the sum of its proper divisors (106696256).

213392506 is a wasteful number, since it uses less digits than its factorization.

213392506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106696255.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 213392506 is about 14607.9603641302. The cubic root of 213392506 is about 597.5758729067.

The spelling of 213392506 in words is "two hundred thirteen million, three hundred ninety-two thousand, five hundred six".